18．(2017·江西会昌中学月考)—Alison, I'm sorry. I can't come to the wedding with you tomorrow morning.

　　—________？

　　—My grandma was severely ill, so I have to stay in the hospital to look after her.

　　A．How is it

　　B．How come

　　C．So what

　　D．What's the problem

　　[解析]How come 怎么会呢？表示失望的情绪。

　　[答案]B

　　19．(2017·山东诸城月考)—Are you going to attend the lecture?

　　—________. I might have to visit my uncle.

　　A．It depends

　　B．Thank you

　　C．Sounds great

　　D．Don't mention it

　　[解析]It depends. 那看情况而定。

　　[答案]A

　　20．(2017·山东诸城月考)—Let's have a game of tennis; the loser has to treat the other to a hot dog.

　　—________.

　　A．I'm afraid so

　　B．It's a deal

　　C．You've got a point

　　D．My treat

　　[解析]It's a deal.一言为定。

　　[答案]B

　　21．(2017·浙江十校期中联考)—We have booked a room for today and tomorrow.

　　—________， sir.

　　A．I'm sure

　　B．My pleasure

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